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        • Lifecycle status

          Discontinued / Obsolete by OEM
          Apter Power supplies factory-fresh Siemens 6ES7331-1KF02-0AB0 hardware, providing automation engineers with a dependable, current-generation source for high-density sensor measurement and robust PLC data acquisition.

        6ES7331-1KF02-0AB0

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        The Siemens 6ES7331-1KF02-0AB0 SIMATIC S7-300 Analog Input Module provides 8 isolated analog inputs with 13-bit resolution, supporting voltage, current, and multiple sensor types, including Pt100 and NI1000, with a fast conversion time of 66 ms.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 6ES7331-1KF02-0AB0

        • Manufacturer:
          Siemens
        • Part Number:
          6ES7331-1KF02-0AB0
        • Product Family:
          Siemens Simatic S7-300
        • Product Type:
          Analog Input Module
        • Stock:
          2
        • from backplane bus 5 V DC, max.:
          90 mA
        • Power loss, typ.:
          0.4 W
        • Number of analog inputs:
          8
        • permissible input voltage for voltage input (destruction limit), max.:
          30 V; 12 V continuous, 30 V for max. 1 s
        • permissible input current for current input (destruction limit), max.:
          40 mA
        • Cable length:
          200 m; max. 50 m at 50 mV
        • Resolution with overrange (bit including sign), max.:
          13 bit
        • Integration time, parameterizable:
          Yes; 60 / 50 ms
        • Basic conversion time (ms):
          66 / 55 ms
        • Isolation tested with:
          500 V DC
        • required front connector:
          40-pin
        • Weight:
          0.25 kg
        • Estimated shipping dimensions:
          4x11.6x12.4cm
        • Tariff Code:
          8537101190
        • Country of origin:
          Germany
        • Place of shipment:
          Xiamen, Fujian, China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Communication Safety Application

        Features:

        • Eight Isolated Analog Inputs Supporting Voltage, Current, And Multiple Sensor Types
        • Maximum 13-Bit Resolution With Parameterizable Integration Time For Accurate Measurement
        • Efficient Operation With Low Power Loss And Backplane Supply Of 5 V DC, Max. 90 mA
        The Siemens 6ES7331-1KF02-0AB0 SIMATIC S7-300 Analog Input Module is designed to capture precise analog signals from a variety of industrial sensors. Each of its eight channels is electrically isolated, ensuring safe and interference-free measurements across voltage, current, and temperature sensors such as Pt100 and NI1000. This versatility makes it suitable for complex automation and monitoring setups.

        Voltage inputs are rated for 12 V continuous operation and can tolerate short-term spikes up to 30 V, while current inputs withstand up to 40 mA. These limits provide robust protection against transient conditions and accidental overloading, ensuring that both the module and connected devices remain safe during operation.

        Equipped with parameterizable integration times of 50 or 60 ms and a fast basic conversion time of 66 ms, the module allows flexible adjustment to match specific process requirements. It also accommodates cable lengths up to 200 m, supporting installations in distributed systems, while its 40-pin front connector ensures seamless integration into the S7-300 rack. This combination of reliability, flexibility, and efficiency makes it ideal for demanding industrial environments.

        The 6ES7331-1KF02-0AB0 Siemens SIMATIC S7-300 Analog Input Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Siemens 6ES7331-1KF02-0AB0 SIMATIC S7-300 Analog Input Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        Siemens 6ES7331-1KF02-0AB0 SIMATIC S7-300 Analog Input Module Specs

        General

        • Manufacturer Siemens
        • Model 6ES7331-1KF02-0AB0
        • Condition New Original ready stock
        • Product Family 6AG1331-1KF02-2AB0,6ES7331-7PE10-0AB0,6ES7331-7PF11-0AB0
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Backplane Bus Integration: Connects to the CPU or Interface Module (IM) via a U-shaped connector on the back of the module, enabling high-speed parallel data transmission.
        • Signal Protocol Compatibility: Supports multiple industry standard signal inputs, including voltage (±10V, 1-5V), current (0/4-20mA), resistance (RTD/PT100), and thermocouples.
        • Distributed Communication Expansion: The ET 200M interface module can be connected to a PROFIBUS DP or PROFINET network for remote I/O.
        • Parameterized Configuration: Communication parameters (such as measurement range, integration time, smoothing filtering, etc.) can be set via STEP 7 or TIA Portal software.
        • Electrical Isolation: 500V DC opto-isolation between the channel and the backplane bus prevents CPU damage from strong electrical interference in the field.
        • Overload Protection: Features short-circuit protection in current input mode, capable of withstanding signal line misconnections within a certain range.
        • Diagnostic Function: Supports open-circuit detection (e.g., 4-20mA signal) and overflow/undercurrent alarms. When a sensor is damaged or the signal exceeds its range, the module sends a diagnostic interrupt to the CPU.
        • Digital Filtering: Built-in integrated time setting (e.g., 50ms/60ms) effectively suppresses 50Hz/60Hz power frequency interference from the grid, ensuring data accuracy.
        • Temperature Monitoring System: Directly connects to Pt100 or thermocouples for monitoring the winding temperature of boilers, reactors, or large motors.
        • Pressure and Flow Control: Receives 4-20mA signals from transmitters for level monitoring and flow statistics in water treatment and chemical plants.
        • Hydraulic and Pneumatic Control: Works with displacement or pressure sensors to achieve closed-loop control of hydraulic station pressure synchronization and robotic arm position.
        • Energy Management System: Collects analog voltage signals from power transmitters to monitor the factory's power consumption and equipment operating load in real time.
        Description
        The SIEMENS 6ES7331-1KF02-0AB0 expansion module provides industrial operators with exceptional sensor flexibility by supporting a broad spectrum of input types including standard voltage, current loop, resistance, and standard/climate resistance thermometers such as Pt100 and Ni100. This eliminates the need for multiple specialized cards, reducing your overall inventory costs and streamlining hardware engineering inside the control cabinet. 

        Engineered to withstand harsh electrical noise and field interference, the SIEMENS 6ES7331-1KF02-0AB0 features robust galvanic isolation between the input channels and the backplane bus. Tested up to 500 V DC, this high-level potential separation protects your central S7-300 CPU from localized field surges and ground loops, drastically reducing unplanned downtime and maintaining uninterrupted system availability. 

        With an 8-channel density packed into a compact 40 mm wide form factor, the SIEMENS 6ES7331-1KF02-0AB0 optimizes valuable space within electrical enclosures. Its basic conversion time of 66 ms per channel (at 50 Hz interference suppression) combined with parameterizable integration times provides an ideal equilibrium between fast data processing and stable signal filtering for process manufacturing. 

        The SIEMENS 6ES7331-1KF02-0AB0 is backed by an impressive suite of international certifications, including marine approvals like DNV, ABS, and LRS, alongside hazardous area ratings such as ATEX and IECEx. This comprehensive compliance makes it a globally trusted asset for high-stakes industries, including oil and gas, maritime vessel controls, chemical processing, and power generation. 
        Alternative Names
        6ES7331-1KFO2-OABO 6ES733I-IKF02-0AB0 6ES7331-7KB02-0AB0 6ES7331-7HF01-0AB0 6ES7331-7NF00-0AB0 6ES7331-7NF10-0AB0 6ES7331-7KF02-0AB0 6ES7331-1KF01-0AB0
        Technical notes
        The SIEMENS 6ES7331-1KF02-0AB0 requires a standard 40-pin front connector for terminal wiring and must be configured via STEP 7 or TIA Portal to match specific hardware measurement types. Please note that the SIEMENS 6ES7331-1KF02-0AB0 does not support thermocouples and is currently classified by the manufacturer as a legacy spare part.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What types of inputs does the Siemens 6ES7331-1KF02-0AB0 support?
        It supports voltage, current, Pt100, NI100, NI1000, LG-NI1000, PTC, and KTY sensors across 8 isolated inputs.
        What are the software configuration requirements when integrating a SIEMENS 6ES7331-1KF02-0AB0 into an existing automation architecture?
        The SIEMENS 6ES7331-1KF02-0AB0 is natively supported in STEP 7 Classic and TIA Portal software environments. Engineers must configure the specific measurement type (Voltage, Current, or Resistance/RTD) and range parameters within the hardware configuration properties of the software. Since the module supports 13-bit resolution including the sign, the analog values are scaled using standard Siemens scaling blocks (such as FC105
        How does the SIEMENS 6ES7331-1KF02-0AB0 handle current measurements for 2-wire and 4-wire transmitters?
        The SIEMENS 6ES7331-1KF02-0AB0 supports both 2-wire and 4-wire transducer connections. When using 4-wire transmitters, the encoder provides its own power supply directly to the module channels. For 2-wire loops, the module does not output loop power from its signal terminals, meaning an external 24V DC power supply must be wired in series with the current loop to energize the transducer before routing into the module.
        What are the diagnostic depths and error behaviors of the SIEMENS 6ES7331-1KF02-0AB0 during a channel overrange or wiring fault?
        The SIEMENS 6ES7331-1KF02-0AB0 does not incorporate software-driven diagnostic alarms or group error (SF) LEDs. Instead, fault monitoring is performed via value tracking within the PLC code. When a wire break or overrange occurs, the module outputs a specific hexadecimal value (such as 7FFFH) to the corresponding peripheral input word (PIW), allowing engineers to program threshold logic for safety trips and field interlocks.
        Can the SIEMENS 6ES7331-1KF02-0AB0 be deployed in marine control applications, and what standards does it meet?
        Yes, the SIEMENS 6ES7331-1KF02-0AB0 is heavily certified for maritime applications and carries type approvals from major international ship classification societies including DNV, American Bureau of Shipping (ABS), Lloyd's Register (LRS), and Nippon Kaiji Kyokai (NK). These certificates ensure the module can safely withstand the intense vibrations, damp heat, and salt mist environments typical of offshore vessels and marine machinery.

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